The top of the introductory M&P15 line is the Tactical model. It has a comprehensive set of user-friendly enhancements that, at the same time, don't overdecorate the gun. In addition to all the standard M&P15 features, the flattop Picatinny rail receiver merges seamlessly with a Troy Industries Modular Rail Fore-end (MRF), with full-length MIL-STD-1913 Picatinny rails positioned at 3, 6, 9 and 12 o'clock. This provides a continuous uninterrupted top rail from flattop receiver forward, free-floating for superior accuracy, reliability and cooling.